Biogeochemical Cycling

Matter is conserved


Energy flows, but matter is recycled



Importance of biogeochemical cycling

Transfer, transformation and storage


Biogeochemical cycles: Global

Nutrient cycles: Ecosystem
- Entry of nutrients into system
- fixation (bacteria)
- weathering (rocks)
- deposition (acid rain)
- Internal transfer (recycling)
- Loss of nutrients from system

Carbon cycle: Ecosystems


Carbon cycle: Global



Nitrogen cycle: Ecosystems


Nitrogen cycle: Ecosystems


Decomposition


Decomposition rate: Biomes

Nutrient transfer: Soils

Nitrogen cycle: Global


Primary productivity



Global net primary production


Global net primary production

